I'd say many people don't want to turn a hobby into work, and that's why they don't choose to sell commercially.
I come from a long line of crafts people, many in my family make their own jewelry, covers, tools, clothes, furniture, etc. They'll make stuff to sell at annual festivals, more so to show off than to really make a living from it.
Most agree it's just too much hassle to really go commercial with their hobbies.
If you can find a crafts person that works in the particular area of what you are wanting, it's usually not to hard to talk them in to making what you want. Or better yet, having them help you make it yourself.
I'm sure it's very regional though. A lot of the old ways of life are still preserved in the generation of folks that live in this area.